6+9r^2=22

Solution for 6+9r^2=22 equation:

Simplifying
6 + 9r2 = 22

Solving
6 + 9r2 = 22

Solving for variable 'r'.

Move all terms containing r to the left, all other terms to the right.

Add '-6' to each side of the equation.
6 + -6 + 9r2 = 22 + -6

Combine like terms: 6 + -6 = 0
0 + 9r2 = 22 + -6
9r2 = 22 + -6

Combine like terms: 22 + -6 = 16
9r2 = 16

Divide each side by '9'.
r2 = 1.777777778

Simplifying
r2 = 1.777777778

Take the square root of each side:
r = {-1.333333333, 1.333333333}